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Ecotoxicological information

Long-term toxicity to fish

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Administrative data

Endpoint:
fish life cycle toxicity
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: No guideline followed, but study well described, which is longer than required in guidelines for long term toxicity to fish, more parameters taking into account.

Data source

Reference
Reference Type:
publication
Title:
Chronic Toxicity of Vanadium to Flagfish
Author:
D.A. Holdway and J.B. Sprague
Year:
1979
Bibliographic source:
Water Research vol 13: 905-910.

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Flagfish exposed to 4 vanadium concentrations up to 96 days; mortality, growth, reproduction and abnormalities were assessed, and for 2 generations
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
not specified
Details on test material:
No details
Specific details on test material used for the study:
Details on properties of test surrogate or analogue material (migrated information):
V2O5
RNCAS: 1314-62-1
MW 181.9

Sampling and analysis

Analytical monitoring:
yes

Test solutions

Vehicle:
no
Details on test solutions:
Test-water:
Total alkalinity: 230 mg/L as CaCO3
Ca: 64 mg/L
Mg: 50 mg/L
Na: 46 mg/L
K: 7,8 mg/L
Fe: 0,011 mg/L
Zn: 0.08 mg/L
Pb: 0,002 mg/L
Cu: 0,001 mg/L
Ni: 0,0002 mg/L
Cd < 0,0001 mg/L
Va < 0,001 mg/L

Test organisms

Test organisms (species):
Jordanella floridae
Details on test organisms:
The exposure started with one-week-old larvae and continued for 3.2 months.

Study design

Test type:
flow-through
Water media type:
freshwater
Limit test:
no
Total exposure duration:
96 d

Test conditions

Hardness:
347 mg/L as CaCO3
Test temperature:
25.4°C
pH:
8.15
Dissolved oxygen:
7.4 mg/L
Nominal and measured concentrations:
0, 0.041, 0.17, 0.48 and 1.5 mg/L
Details on test conditions:
TEST SYSTEM
- Aeration and controlled temperature
- Type of flow-through: diluter
- Renewal rate of test solution/flow rate: 120L/day
- 15 fish per tank vessel and conentration
- Photoperiod: 16h day light and 8h dark
- Light intensity: 20-40 lux

EFFECT PARAMETERS MEASURED (with observation intervals if applicable) :
Mortality, growth and abnormalities were assessed at 28 days
Daily counts of number of eggs laid were made from 71 to 95 days of exposure.
Hatchability of eggs was assessed on 20-30 eggs collected from each tank on the first four successive days of spawning that yielded 20 or more eggs.
Mortality, growth and abnormalities among the second generation were assessed on 30-60 larvae pooled from each concentration, during the 30 days following hatching.
Growth was determined using three measurements: total length, wet weight and dry weight after 24h at 105°C.
Reference substance (positive control):
no

Results and discussion

Effect concentrationsopen allclose all
Duration:
28 d
Dose descriptor:
LC50
Effect conc.:
1.88 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
element
Remarks:
vanadium
Basis for effect:
other: larval mortality
Duration:
28 d
Dose descriptor:
NOEC
Effect conc.:
>= 0.48 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
element
Basis for effect:
weight
Duration:
28 d
Dose descriptor:
NOEC
Effect conc.:
0.17 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
element
Basis for effect:
mortality
Duration:
70 d
Dose descriptor:
NOEC
Effect conc.:
>= 0.48 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
element
Basis for effect:
weight
Duration:
96 d
Dose descriptor:
NOEC
Effect conc.:
>= 1.5 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
element
Basis for effect:
weight
Duration:
30 d
Dose descriptor:
NOEC
Effect conc.:
0.041 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
element
Basis for effect:
weight
Remarks:
second generation
Duration:
96 d
Dose descriptor:
NOEC
Effect conc.:
>= 1.5 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
element
Basis for effect:
reproduction
Reported statistics and error estimates:
NOEC values were calculated by Duncan's New Multiple-ERange test or Dunnett's test to distinguish differences between means.
Lethal concentrations were estimated by probit analysis.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Executive summary:

Flagfish Jordanella floridae were exposed to 4 vanadium concentrations up to 96 days; 0.041, 0.17, 0.48 and 1.5 mg/L under flowthrough conditions. Mortality, size, reproduction and abnormalities were assessed, for 2 generations.

The first 0.041 mg/L concentration was found to increase the average dry weights of all generations of flagfish. The NOEC for weight of first generation was defined to be 0.48 mg/L, and 0.17 mg/L for mortality.

The reproductive performances were not affected by exposure to vanadium.

The only deleterious effect was a decrease in dry weight of second generation larvae, from 0.17 mg/L. The authors considered that the sublethal treshold for toxicity of vanadium would approximate the geometric average of 0.17 and 0.041 mg/L, which is 0.08 mg/L.